a = 1
print(id(a))
a = 1
print(type(a))
print(id(a))
a = 3.14
print(type(a))
del a

b = True
print(b,type(b))

c = 4+3j
print(c,type(c))

m = 10
n = 30
y=m
m=n
n=y
print(m,n)


m=m+n
n=m-n
m=m-n
print(m,n)